package com.company.project.utils;

import org.apache.tomcat.util.codec.binary.Base64;

import java.io.UnsupportedEncodingException;
import java.math.BigInteger;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

public class MD5Util {

    public static String md5(String plainText, String username) {
        byte[] secretBytes = null;
        String pwd = plainText + username;
        try {
            secretBytes = MessageDigest.getInstance("MD5").digest(
                    pwd.getBytes());
        } catch (NoSuchAlgorithmException e) {
            throw new RuntimeException("没有md5这个算法！");
        }
        // 16进制数字
        String md5code = new BigInteger(1, secretBytes).toString(16);
        // 如果生成数字未满32位，需要前面补0
        for (int i = 0; i < 32 - md5code.length(); i++) {
            md5code = "0" + md5code;
        }
        return md5code;
    }
}
